Does the Tet holiday in Vietnam occur in late January or early February?

Câu hỏi :

Read the passage carefully and then answer the given questions.

  Tet or Lunar New Year is the most important celebration in the year which occurs in late January or early February. Tet is a time for family members who live apart try to be together . The preparations and celebrations used to be spread over  months but nowadays the holiday is much shorter. However, there is great excitement building up well before Tet. Streets are decorated with colored lights and red banners. Shops are full of goods. People ofen buy gifts, clean and decorate their house and cook traditional foods for Tet.

          On the first days of Tet people try to be nice and polite to others. They visit their relatives or friends and exchange New Year’s wishes. Children receive the “lucky money” inside red envelopes. Many people go to the pagoda to pray for a happy new year for   themselves and their family.Tet is really a time of fun and festivals throughout the country.

Does the Tet holiday in Vietnam occur in late January or early February?